CN211228412U

CN211228412U - Water diversion power generation system for large falling depth

Info

Publication number: CN211228412U
Application number: CN201922087975.3U
Authority: CN
Inventors: 江波; 邱玲; 赵桂连
Original assignee: PowerChina Chengdu Engineering Co Ltd
Current assignee: PowerChina Chengdu Engineering Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-08-11
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a diversion power generation system for large falling depth, belonging to the field of hydraulic and hydroelectric engineering and providing a diversion power generation system for large falling depth which can carry out graded relay utilization; the high-head unit and the low-head unit are arranged in the main plant, a branch pipe is arranged at the tail end of the pressure pipeline and is divided into two paths, one path is communicated with the corresponding high-head unit, the other path is communicated with the corresponding low-head unit, independent tail water connecting holes are correspondingly arranged for each high-head unit and each low-head unit, each tail water connecting hole is communicated with a shared tail water surge chamber, and a shared tail water hole is arranged behind each tail water surge chamber. The utility model discloses a high water head unit realizes utilizing the diversion electricity generation of high water head, realizes utilizing the diversion electricity generation of low water head through low water head unit, and then has realized utilizing the utilization of "relay" of the big falling depth that disappears, can effectual improvement water resource.

Description

Water diversion power generation system for large falling depth

Technical Field

The utility model relates to a hydraulic and hydroelectric engineering field especially relates to a diversion power generation system for falling depth that disappears greatly.

Background

At present, the capability of manufacturing a water turbine generator set with the ratio of the maximum generating head to the minimum generating head exceeding 1.8 is not available at home and abroad. In water and electricity development, when the water level of a certain power station reservoir is too large in falling depth, the requirement for the falling depth of the power station cannot be met by adopting a single water head unit, and therefore the problem of water head resource waste is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a diversion power generation system who carries out hierarchical "relay" utilization to the falling depth of falling degree that disappears greatly is used for the diversion power generation system of the falling depth of falling degree that disappears greatly, can the effectual utilization ratio that improves the water resource.

The utility model provides a technical scheme that its technical problem adopted is: a diversion power generation system for big falling depth that disappears, including the diversion tunnel, the upper reaches surge-chamber, pipeline under pressure, the main building, the tail water connects the hole, main room, tail water surge-chamber and tail water hole, be provided with high head unit and low head unit in the main building, pipeline under pressure sets up the bifurcated pipe at the tail end and divide into two the tunnel, communicate with the high head unit that corresponds all the way, another way and the low head unit that corresponds intercommunication, be provided with independent tail water connection hole for every high head unit and every low head unit correspond, each tail water connection hole communicates with the tail water surge-chamber of sharing, set up the tail water hole of sharing behind the tail water surge-chamber.

Further, the method comprises the following steps: normal water level of reservoir is h_{Is just}The reservoir dead water level is h_{Death by death}(ii) a The high water head unit and the low water head unit are arranged to be in relay connection to complete the utilization of the water head within the falling depth range.

Further, the method comprises the following steps: the water level of the operation boundary reservoir of the high water head unit and the low water head unit is h_xWherein h is_xIs located at h_{Is just}And h_{Death by death}In the meantime.

Further, the method comprises the following steps: the high-water head unit and the low-water head unit share a diversion tunnel, an upstream pressure regulating chamber, a pressure pipeline, a tail water pressure regulating chamber and a tail water tunnel structure.

The utility model has the advantages that: the utility model discloses a divide into two the same pressure conduit bifurcation and communicate with high water head unit and low water head unit respectively correspondingly, realize the diversion electricity generation utilization to the high water head through high water head unit, realize the diversion electricity generation utilization to the low water head through low water head unit, and then realized the "relay" utilization to the big depth of falling that disappears, can the effectual utilization ratio that improves the water resource; meanwhile, the high-water-head unit and the low-water-head unit can share the structures of the diversion tunnel, the upstream surge chamber, the pressure pipeline, the tail water surge chamber, the tail water tunnel and the like, so that the overall engineering investment can be reduced as much as possible, and the construction period is shortened.

Drawings

Fig. 1 is a schematic plan view of a water diversion power generation system for large falling depth of the present invention;

labeled as: the water diversion tunnel comprises a water diversion tunnel 1, an upstream pressure regulating chamber 2, a pressure pipeline 3, a main workshop 4, a tail water connecting hole 5, a main transformation chamber 6, a tail water pressure regulating chamber 7, a tail water hole 8, a high water head unit 9 and a low water head unit 10.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Referring to shown in the attached figure 1, a diversion power generation system for big falling depth that disappears, connect hole 5, main room 6, tail water surge-chamber 7 and tail water hole 8, its characterized in that including diversion tunnel 1, upstream surge-chamber 2, pipeline under pressure 3, main building 4, tail water: the high-head unit 9 and the low-head unit 10 are arranged in the main plant 4, the pressure pipeline 3 is divided into two paths by a branch pipe arranged at the tail end, one path is communicated with the corresponding high-head unit 9, the other path is communicated with the corresponding low-head unit 10, independent tail water connecting holes 5 are correspondingly arranged for each high-head unit 9 and each low-head unit 10, each tail water connecting hole 5 is communicated with a shared tail water pressure regulating chamber 7, and a shared tail water hole 8 is arranged behind the tail water pressure regulating chamber 7.

In the utility model, the high water head unit 9 and the low water head unit 10 are correspondingly arranged for each pressure pipeline 3, the high water head unit 9 is used for diversion and power generation of the high water head, and the low water head unit 10 is used for diversion and power generation of the low water head, so that relay utilization of large water falling depth is realized, and the utilization rate of water resource can be effectively improved; meanwhile, the high-water-head unit 9 and the low-water-head unit 10 can share the structures of the diversion tunnel 1, the upstream pressure regulating chamber 2, the pressure pipeline 3, the tail water pressure regulating chamber 7, the tail water tunnel 8 and the like, so that the overall engineering investment can be reduced as much as possible, and the construction period is shortened.

Under normal conditions, the normal water level of the reservoir is h_{Is just}The reservoir dead water level is h_{Death by death}(ii) a The utility model provides a high water head unit 9 is h with low water head unit 10's operation boundary reservoir water level_xIn which is provided with h_xIs located at h_{Is just}And h_{Death by death}To (c) to (d); namely, when the current water level of the reservoir is higher than hx, the high water head unit 9 is used for conducting water diversion and power generation, and when the current water level of the reservoir is lower than hx, the low water head unit 10 is used for conducting water diversion and power generation. Without loss of generality, h is the ratio of the maximum generating head to the minimum generating head of the high water head unit 9 to the minimum generating head of the low water head unit 10_xCan be at h_{Is just}And h_{Death by death}Are reasonably arranged.

Referring to the specific example shown in fig. 1, two pressure pipes 3 are provided, two pressure pipes 3 are respectively provided with a diversion tunnel 1, and the two pressure pipes 3 share the same upstream pressure regulating chamber 2 structure; a high water head unit 9 and a low water head unit 10 are respectively arranged corresponding to each pressure pipeline 3; all the high-water-head units 9 and the low-water-head units 10 are arranged in the same main plant 4, each high-water-head unit 9 and each low-water-head unit 10 are respectively provided with an independent tail water connecting hole 5, each high-water-head unit 9 and each low-water-head unit 10 share the same main transformer chamber 6 structure, and each tail water connecting hole 5 shares a tail water surge chamber 7 and a tail water hole 8. Without loss of generality, the arrangement is still applicable when the total number of the units is other numbers.

Claims

1. A diversion power generation system for big falling depth that disappears, including diversion tunnel (1), upper reaches surge-chamber (2), pipeline under pressure (3), main building (4), tail water connection hole (5), main room (6), tail water surge-chamber (7) and tail water hole (8), its characterized in that: the high-water-head unit (9) and the low-water-head unit (10) are arranged in the main workshop (4), the pressure pipeline (3) is provided with a branch pipe at the tail end and divided into two paths, one path is communicated with the corresponding high-water-head unit (9), the other path is communicated with the corresponding low-water-head unit (10), independent tail water connecting holes (5) are correspondingly arranged for each high-water-head unit (9) and each low-water-head unit (10), each tail water connecting hole (5) is communicated with a shared tail water surge chamber (7), and a shared tail water hole (8) is arranged behind each tail water surge chamber (7).

2. The water-diverting power generation system for large fall depth of water of claim 1, characterized in that: normal water level of reservoir is h_{Is just}The reservoir dead water level is h_{Death by death}(ii) a The high water head unit (9) and the low water head unit (10) are arranged to complete water head utilization within a falling depth range in a relay mode.

3. The water-diverting power generation system for large fall depth of water according to claim 2, characterized in that: the water level of the operation boundary reservoir of the high water head unit (9) and the low water head unit (10) is h_xWherein h is_xIs located at h_{Is just}And h_{Death by death}In the meantime.

4. The water-diverting power generation system for large falling depth of water according to any of claims 1 to 3, characterized in that: the high-water-head unit (9) and the low-water-head unit (10) share the structure of the diversion tunnel (1), the upstream surge chamber (2), the pressure pipeline (3), the tail water surge chamber (7) and the tail water tunnel (8).